There are only two meteorites from Azerbaijan and both are witnessed falls. There is the IAB Yardymly and Indarch, a single 27 kilogram stone which arrived at 8:10 PM on April 7, 1891 about 25 miles from the border with Armenia. Several new minerals have been discovered in Indarch, including rudashevskyite, zolenskyite and roedderite. Presolar silicon carbide has been found in Indarch and more than 1,300 papers cite Indarch.

Enstatite chondrites get their name from their abundance of enstatite. They form in oxygen-poor environments and the result is a high abundance of metal and sulfide-rich mineralogy. Due to their high reduced composition, they likely formed in the inner solar system — possibly even closer to the Sun than Mercury. Many researchers believe enstatite chondrites help to explain the formation of Mercury as it’s also highly reduced. Rarely available, now offered is a partial slice whose curved rim is covered in fusion crust. 135 years since making its earthly debut this specimen still reeks of sulfur.

73 x 104 x 3mm (3 x 4 x 0.1 in.) and 58.1 grams

Provenance: Field Museum, Chicago

Estimate $6,000 – 8,000 * Reserve: $5,000